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Local and remote drivers of the observed thermohaline variability on the northern Adriatic shelf (Mediterranean Sea)
Continental Shelf Research ( IF 2.3 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.csr.2020.104110
Ivica Vilibić , Petra Zemunik , Natalija Dunić , Hrvoje Mihanović

Abstract In situ thermohaline variables measured monthly or bimonthly in the shallow northern Adriatic at prescribed stations between 1979 and 2017 were correlated with the local (river runoff, precipitation, net heat flux) and remote atmospheric (various hemispheric and regional indices) and oceanic (the Adriatic-Ionian Bimodal Oscillating System, BiOS) drivers acting on monthly to annual timescales. The highest correlation between the temperature and the local drivers was obtained in winter along the western part of the study area, while the rivers and precipitation mostly shaped the summer and December salinity values. The net heat fluxes and river discharges preceding the dense water formation (DWF) by 1–2 months and up to 3 months were found to be important for the February temperature and salinity variability, respectively. No significant correlations were found between the February thermohaline variables and the monthly BiOS index for the phase lags up to −11 months, while the correlation was the largest between the yearly averaged BiOS index and the yearly averaged salinity at phase lags of −2 to −4 years. The bottom yearly averaged salinity has also been highly correlated with the Mediterranean Oscillation index at phase lags of −1 and −3 years, while the yearly averaged surface temperature was influenced by the East Atlantic and East Atlantic/West Russia patterns. Acting independently on different timescales, both the local and remote processes were found to drive the thermohaline variability in the northern Adriatic, thus providing an option for a forecast of the DWF and the thermohaline circulation in the Adriatic-Ionian basin.

中文翻译:

在亚得里亚海大陆架北部(地中海)观察到的温盐变化的本地和远程驱动因素

摘要 1979 年至 2017 年期间,在亚得里亚海北部浅层的指定站点每月或双月测量的原位温盐变量与当地(河流径流、降水、净热通量)和远程大气(各种半球和区域指数)和海洋(亚得里亚海-爱奥尼亚双峰振荡系统 (BiOS) 驱动程序按月到年的时间尺度行事。在研究区西部的冬季,温度与当地驱动因素之间的相关性最高,而河流和降水主要影响了夏季和 12 月的盐度值。发现在密集水形成 (DWF) 之前 1-2 个月和最多 3 个月的净热通量和河流流量分别对 2 月的温度和盐度变化很重要。在相位滞后长达 -11 个月的情况下,2 月温盐变量与月 BiOS 指数之间没有发现显着相关性,而在相位滞后为 -2 至 - 时,年平均 BiOS 指数与年平均盐度之间的相关性最大。 4 年。底部年平均盐度也与地中海涛动指数高度相关,相位滞后为 -1 年和 -3 年,而年平均地表温度受东大西洋和东大西洋/西俄罗斯模式的影响。在不同的时间尺度上独立作用,发现本地和远程过程驱动了亚得里亚海北部的温盐变化,从而为亚得里亚海-爱奥尼亚盆地的 DWF 和温盐环流的预测提供了一种选择。
更新日期:2020-08-01
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